Suction-cleaner



E. C. ROBERTSON.

SUCTION CLEANER.

APPLICATION FILED MAVSI, 19 17.

Patented mm, 1920,

2 SHEETS-SHEET I.

irr s.

E. C. ROBERTSON.

SUCTION CLEANER.

APPLICATION FILED MAY 31, 1917.

Patented Mm, 16 11920.

. 2 SHEET$-SHEET 2- 51 6. WM$MWM UNITE STATES PATENT OFFICE.

} ELBOY C. ROBERTSON. OF CLEVELAND, OHIO. ASSIGNOR, BY MESNE ASSIGNMENTS, TO

ELECTRIC VACUUM. CLEANER COMPANY, INC., EAST CLEVELAND, OHIO, A COB- rom'r ion or NEW YORK.

SUCTION-CLEANER.

Patented Mar. 16, 1920.

Application filed May 31. 1917'. Serial No. 171,814.

To all whom it may concern.

Be it known that I, Euro]? 0. Rounu'rsox. a subject of the King of Great Britain, and a citizen of the Dominion of Canad a,'residing at Cleveland, in. the county of Cu ahoga and State of Ohio, have invente a certain new and useful Improvement in Suction-Cleaners, of-which the followin is a full, clear, and exact description, re erence being had to the accompanying drawm s. V

This .invention relates to suction cleanersof the type wherein a casing having a collecting nozzle and a motor operated fan is moved about over the floor so as to present said nozzle to various arts thereof to remove dust and refuse t erefrom. The objects of the invention are the provision of a device of this character of simplified, im-

roved, and cheapened construction, greater improvements. In these drawings, Figure 1 represents a side. elevation of my improved cleaner; Fig, 2 re resents a longitudinal vertical sectional v ew through the nozzle and fan casing, the motor shell being shown 3 and 4 are sectional in elevation; views correspon in to the lines 3.-3 and 4-4 respectively 0 Fig. 2; Fig. 5 is'a secspiral shape, said wall at its portion of maximum. radius merging with the outlet neck 2. At its rearward. side the fan casing 1, is extended to form the axial cylindrical collar 3 into which fits the end 4 of the.

motor shell At theforward side of the fan chamber is formed the collecting, nozzle which consists of a convex web 6 extending forwardly and downwardly opposite to and in alinement with the collar 3 and merging with the wall 7 whose direction is transverse to the fan chamber axis ,and whichterminates in a transverse lip 8. Spaced from and substantially parallel to the wall 7 is a second wall 9 terminating in a lip 10 which, in connection with the lip 8, defines an inlet mouth. The lane of this mouth, in the present embodiment, is substantially paral lel to the fan chamber axis, and the walls 7 and 9 are approximately perpendicular thereto. The lateral margins ofthese walls are connected by a web which first rises abruptly, as shown at 11, and then tapers inwardly and upwardly as at 12 until it merges with the web 6 as shown at 13. Beneath and inside of the web 6 is a tubular wall 15 defining a passageway opening into the center of the fan chamber, said passageway also communicating with the space between the walls 7 and 9. I have also shown the wall 15 as connected to the web -12 by. an internal stiffening web 16, but this is not necessary structurally. formed with an aperture 18, in alinement with the fan chamber axis adapted to receive either a removable cover 19 for closing it or a hose tube, (not shown,) extend- The wall .7 is.

ing into the inner opening. The motor shell 1 is secured in the collar 3 by means of a plurality of radial screws 2020 in the well-known mannr.

The suction fan is shown at 24, and in I order to form a smooth and close fitting-wall for the fan chamber past which the fan blades can sweep closely without binding, I first recess the chamber wall, as shown at and then introduce therein a fiat circular steel plate 26. This late is formed with a central aperture in w iich is closely received an annular rojecting lip 27 formed at the extremity o the tubular wall 15, which liis afterward 5 un over so as to secure sai late and hod it permanently in lace. The casin is ordinarily cast out of a umirfum whic generally has a rough and uneven surface, and, owing to its toughness, is

very hard to machine. The construction I have illustrated can allbecast e xce'pting few narrow vbearin places, wherefore the manufacture is muc faclhtated.

' In the embodiment here shown the casing .is supported for-movement about the floor by means of a single central roller secured to the motor casing at the rear of the center.

I ofgravity, together with a pair of rollers 3131 arranged one at each side of the machine in the rear of the inlet mouth and in front ofthe center of gravity of the casing. The latter rollers are conveniently journaled u on a crankshaped rockshaft 32 suitably .plvoted to the casing and verticall ad ustable by means of the set screw 33. he neck 2 communicates with the dust bag 34, and the machine is moved about by means of the handle 35 connected by the curved yoke 36 to t e refuseidischarged froin the fan chamher, and produces a more efficient combined 'ing shown in Fi s. 3, 5, and 6.

interconnection-between the force of gravity and the force created by the centrifugal motion of the fanthan an otherarrangement with which I am familiar,

Any suitable or convenient brush mechanism can be employed in connection with my improved cleaner, the one which I refer beccording to this construction the brush consists of a wooden 'bar 40 having bristle tufts 41 projecting' from one edge and a spring 42 pro-' jecting from the opposite edge. This bar is inserted longitudinally into a rectangular casing 43 having in one side a longitudinal slot 44' for the. protrusion of the bristles. At one end of said casin is an car 45 having a longitudinal notch an at the opposite end an car 46 having a transverse notch;

Located inside the collectin nozzle are a pair of spaced studs 47-47 avin heads 48 -48 and between said heads and t e bases of. the studs are U shaped friction'springs49. To insert the brush the ear 45 is first presented to its stud so that it may enter between the head 48 andspring 49, after which the brush casing is swung laterally so as tov present the ear 46 to the other stud in the held during use but-can be instantly removed same manner. The brush is thus securely for the purpose of cleaning or replacement.- It will be understood that many changes of I detail of'construction could be made wlthout ".departing frommy invention, and all such modifications are claimed'as within the purview of my Letters Patent;

Having thus described my invention what Iclaim is:-

1. In a suction cleaner, the combination of a fan casing, and a rotary fan therein, said fan comprising a disk and a lurality of blades on one side thereof radiating outwardly to the'periphery of the disk, the side wall of said fan casing adjacent said blades being recessed and havin anchored therein a lining plate close to whieli said fan blades sweep, and a nozzle communicating with said fan casing through an opening in-said lining plate. 5 a

. 2. In a suction of a fan casing, and a rotar fan comprising a disk and a plurality ofb ades onv onesidc thereof radiating outwardly to the periphery of the disk, the side wall of said fan casing adjacent said blades beinq recessed and hav -1ng anchored therein a hnmg plate close tov which said fan blades sweep and a nozzle communicatin with said fan casing through. a central axia opening in said lining plate. 3. In a suction cleaner, the combination of a fan casing and a rotary fan therein com. prising a disk and a plurality of blades radiating out from one side thereof, the side wall of said fan casing adjacent said fan blades being recessed and havin anchored therein a lining plate, a forwar' ly downwardly extending nozz e, said nozzle comprising a tubular member connected between the downwardl extending portion of rejecting and said nozzle and said an casing and leading throu h an opening in said liningplate. 1

4, n a suction cleaner, the combination of a fan casin and a rotary fan therein comprising a disk and a lurality of blades radiatin "out" from one si e thereof, the wall of said an casing adjacent said fan blades being recessed and having anchored therein a lining'plate, a forwardly projecting and downwardly extending nozzlejsaid nozzle comprising atubular member connected. be-

tween the downwardly extending portion ,of said nozzle and said fancasin andleading through a central axial opening :insaid lining plate. I Y [5. In a suction cleaner, thecombination of a motor casing and a fancas'i'n'g, said casings havingcooperating cylindrical flanges;

for securing the two casings" to ether, a rotary fan in said fan casing ."aving fan blades, the forward side-of; said fan casing being recessed and having an'chored therein an annular plate closeto which said fan.

blades sweep, a nozzle projecting forwardly of said fan casing and-com rising a tubular ame'mber in register with tie annular plate and inv axial. 'a'linement with said casings, aid member c'o necting the downwardly exv 0 cleaner, the combination a tending of said nozzle with'said fan casing.

6. n a. suction cleaner, the OOmbIDEtIOII of a motor casing and afan casing,'a rota fan in said fan casingcomprising a disk an fan blades on theforward side thereof,

-- the forward side wallof said fan casin Y havmember in register with said opening, and inv axial alinement with saidcasings, said mem her forming a communicating channel. be-' ing a central axial o ning therein an having anchored around aid openi an annular plate. close to which said an blades sweep, a nozzle communicating with said fan casing, said nozzle comprising a tubular tween said fan-casing and the downwardly extending portion of said nozzle.

7. In a suction cleaner, the combination of a motor casing and a fan casin said fan casing havm projecting, forwar y. thereof a downward yextending nozzle, atubular member forming a central axial communicating channel between said nozzle and said fan casing, and a rotary fan in said fan' casing having a disk on itsrearward side and having extending forwardl from said disk a plurality of fan 'blades,' t e sidewall Sr of a downwar 1y 7 of the '-fan casing adjacent said fan blades and-surrounding said communicating channel being recessed and ha'vin anchored therein a fiat lining plate for 'e purpose described.

8,. In a suction cleaner, the combination side and having extending forward] from said dish a plurality of fan blades, t e side wall of the fan casing adjacent said fan blades and surrounding said communicating channel being recessed and having anchored therein'a flat lining plate, the forward wall of said nozzle having an opening i aline- I ment withsaid tubularmem'ber, an a closing plate therefor, for thepurpose describ In testimony whereof I hereunto afiix my signature. 7

- ELBOY GBOBERTSON. 

